


Detailed analysis of MySQL-Replication monitoring and automatic failover
1. Server planning
Master:192.168.0.152
Slave: 192.168.0.153 192.168.0.154
Monitoring server: 192.168.0.154
Note: True In the production environment, it is best to have a separate server to monitor the database Replication. Here I will directly use a Salve server as the monitoring server.
2, InstallationMySQL Utilities and MySQL Connectors
Download MySQL Utilities and MySQL Connectors and install
at 192.168.0.154 (Monitoring server) Execute the following commands on the server to install the downloaded MySQL Utilities and MySQL Connectors
yum install mysql-connector-python-2.1.4-1.el6.x86_64.rpm mysql-utilities-1.6.4-1.el6.noarch.rpm
3. Configure the Replcation environment, one Master and two Slave environments
Master:192.168. 0.152
Slave: 192.168.0.153 192.168.0.154
Monitoring Server: 192.168.0.154
For configuring Replication, please refer to the blog posts "MySQL - MS Master-Slave Replication (Read-Write Separation) Implementation" and "MySQL - —MSS master-slave replication (read-write separation) implementation》
, "MySQL - Four steps to upgrade BinLog Replication to GTIDs Replication".
4. Authorize the monitoring machine
on 192.168.0.152, 192.168.0.153 and 192.168.0.154 servers respectively:
mysql>grant create,insert ,drop, select, super, replication slave, reload on *.* to 'replm'@'192.168.0.154' identified by password 'replm' with grant option;
on 192.168.0.152, 192.168.0.153 and 192.168.0.154 execute
mysql>show grants for replm@192.168.0.154;
respectively to verify whether the authorization is successful.
Note: If a separate server monitors Replication, authorization operations are only performed on the Master and Slave servers involved in Replication, and the authorization target IP is the monitoring server IP
5. Modify the configuration files of the Master and Slave servers and enable the configuration
The following is the core configuration in the my.cnf file when configuring Replication monitoring and failover
[mysqld] log-bin=/data/mysql3306log/mysql-bin binlog-format=mixed server-id = 001 sync_binlog=1 gtid-mode=on enforce-gtid-consistency log-slave-updates report-host=192.168.0.154 master-info-repository=TABLE relay-log-info-repository=TABLE
After modifying the configuration, restart the mysql server, and then the mysql server will save the two files master.info and relay-log.info stored in the binary log to the database. At this time, execute use mysql;show tables; You will find that two tables, slave_master_info and slave_relay_log_info, are newly created in the mysql database.
6. Start the monitoring terminal
Execute
#mysqlfailover --master=replm:replm@192.168.0.152 --discover-slaves-login=replm:replm
on 192.168.0.154 (monitoring server). At this point, we have configured Replication monitoring and automatic Failover functionality now.
Note: When the Master server hangs up, mysqlfailover will automatically select one of the slave servers as the Master, and the other slaves will correspond to the new Master server.
Note: When the Master hangs up, mysqlfailover automatically selects a server among other slaves as the Master. When we manually restart the original Master server, mysqlfailover cannot automatically find that the original hung mysql server has been restarted. At this time, We need to manually restart the originally hung mysql server and add it to Replication as a Slave server.
The above is the detailed content of Detailed analysis of MySQL-Replication monitoring and automatic failover. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.

MySQL and phpMyAdmin are powerful database management tools. 1) MySQL is used to create databases and tables, and to execute DML and SQL queries. 2) phpMyAdmin provides an intuitive interface for database management, table structure management, data operations and user permission management.

I encountered a tricky problem when developing a small application: the need to quickly integrate a lightweight database operation library. After trying multiple libraries, I found that they either have too much functionality or are not very compatible. Eventually, I found minii/db, a simplified version based on Yii2 that solved my problem perfectly.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

Article summary: This article provides detailed step-by-step instructions to guide readers on how to easily install the Laravel framework. Laravel is a powerful PHP framework that speeds up the development process of web applications. This tutorial covers the installation process from system requirements to configuring databases and setting up routing. By following these steps, readers can quickly and efficiently lay a solid foundation for their Laravel project.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

When developing an e-commerce website using Thelia, I encountered a tricky problem: MySQL mode is not set properly, causing some features to not function properly. After some exploration, I found a module called TheliaMySQLModesChecker, which is able to automatically fix the MySQL pattern required by Thelia, completely solving my troubles.
